Updated for patch 4.3.
Elementium Ore is one of the newest ore introduced to World of Warcraft with the Cataclysm expansion. You’ll need to have your mining skill level at 475 or higher to begin mining for this ore. You will find Elementium in Elementium Veins and Rich Elementium Veins (these require your mining to be at least 500). While you are mining for Elementium you’ll come across rare node spawns of Pyrite (you can mine this at 525). If you are mining Elementium to make gold please take a look at this Gold Guide to ensure you know the proper strategies to make gold.
Elementium Ore in Deepholm
Deepholm is, in my opinion, the best place to farm for Elementium Ore. The zone is pretty much full of veins and if you stick to the basic route shown on the map below you shouldn’t have problems finding any, unless their are a lot of other players out there farming it too. There is one catch to farming for Elementium Ore in Deepholm (or leveling in Deepholm) and that is that you need to be at least level 82 to be able to get to the zone. It’s because of this that I’ve included another zone you can try out if you aren’t high enough yet.
Elementium Ore in Twilight Highlands
Twilight Highlands is another zone that you can farm for Elementium Ore in. This zone levels 84-85 so if you do skip farming in Deepholm because you aren’t level 82 yet, be aware that if you have to fight mobs while farming it will be difficult. Other than that, there isn’t much you need to know about this zone.
If you’re looking for information on Leveling your Mining see my WoW Mining Guide.